Universal micrometer.



P, LACKNER.

UNWERSAL MICROMETEH.

APPLICATIBH FILED MAY2919II.

1 ,266,493. Patented May14,1918.

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wlmfssfs PM im vE/v ron new hfwm/g lwb ,TORNEI/S UNITED STATES OFFICE.

PETER LACKNER, 0F NEW BRUNSWICK, NEW JERSEY.

QI UNIVERSAL MICRMETER.

Application filed May 29, 1917.

To all whom it may concern.'

Be it known that I, PETER LACKNER, a citizen of the United States, and aresident of New Brunswick, in the county of Middlesex and State of NewJersey, have invented a new and Im roved Universal Miorometer, of whichthe ollowing is a full, clear, and exact description.

This invention relates to measuring instruments and particularly to amicrometer and has for an object 'the provision of an improvedconstruction whereby the usual calipers effect is producedand at thesame time a micrometer adjustment provided.

Another object in view isto provide a micrometer instrument havingcaliper legs associated with mechanism for causing the opening andclosing members to maintain the same 'distance from the center at alltimes..

In the accompanying drawing:

Figure 1 is an elevation of a universal micrometer disclosing anembodiment of the invention.

Fig. 2 is a longitudinal vertical section through the structure shown inFig. 1, the

same being on a slightly enlarged scale.

Fig. 3 is a fragmentary sectional view through Fig. 2 on line 3 3.

Fig. 4 is an enlarged detail side elevation of one of the journal pinsembodying certain features 0f the invention.

Fig. 5 is a view similar to Fig. 2 but showinga slightly modifiedconstruction,

eferring to the accompanying drawing by numerals, 1 and 2 indicatecaliper legs of substantially the usual construction, said legs havingenlarged upper ends 3 and 4 and extensions 5 and 6 for receiving theends of a spring 7 whereby there is a continual tendency for the legs toseparate. The ends 3 and 4 are ivotally connected together by suitableover apping ears connected together by a pivotal bolt 8, said boltpreferably having a head on one end and a nut on the opposite end sothat the ears may be clamped tightly together in order to lock the legs1 and 2 against movement whenever desired, the overlapping ears beingsufficiently resilient for allowing this action.

A compensating bar 9 is provided having one end extending through anaperture in the spring 7 to which is secured a thumb nut 10, while thecentral part of the bar is provided with an apertured enlargement 11surrounding the pin 8 and merging into an ex- Specication of LettersPatent.

Patented May 14, 1918.

Serial No. 171,670.

tension 12 having an internally threaded socket for receiving the bar13, said bar being locked in any desired adjusted position by a nut 14.The end of bar 13 opposite the extension 12 is bifurcated and formedwith apertures for receiving the ivotal pin 15, which pivotal pinextends t rough the ear 16 on the sleeve 17, sleeve 17 slidingly fittingthe bar 18. Bar 18 is provided with a scale 19 having graduations 20arranged at different angles, all of said graduations pointing towardthe center of pin 8 whereby the edge 21 may be positioned parallel withany of the graduations 20 according to the osition of the legs 1 and 2.Part of the s eeve 17 is also provided with graduations so as toindicate the amount of opening as the legs move from a closed positionto an open position.

The sleeve 17 is held centrally by reason of the compensator 9, thoughthe sleeve 17 is allowed a pivotal movement, said pivotal movement beingdesirable in order that the sleeve may automatically adjust itself toslight movements of the bar 18 and also in order that the pin 15 may beremoved when adjusting thc bar 13. When this occurs the pin 15 is notonly removed but sleeve 17 is moved to one side and nut`14 is loosened,whereupon the bar 13 is adjusted to the position desired and nut. 14tightened, after which the sleeve 17 is moved back to its formerposition and pin 15 reinserted. Usually only one adjustment of theseparts is necessary, which takes place before the instrument leaves themanufacturing establishment. The provision of the compensator 9 andassociated parts is to maintain the bar 18 the same distance from thepin 8 at all times so that the movement caused by nut 2.2 or by spring 7will be in the proper ratio.

The bar 18 is provided with an enlargement 23 having a round aperturetherethrough for accommodating the round pin 24, said pin carryingbushings 25 and 26 at the. opposite ends, said bushings having a roundaperture for accommodating the pin 9.4 and squared sides for fittinginto the respective slots 26 and 27. Covering and retaining plates -28and 2.9 are provided, said plates being held in position by any suitablemeans. As the legs 1 and 2 open and close the bar 18 is held a certaindistance from pin 8 but the slots 26 and 27 allow a )roper pivotalmovement. In order to pro uce a proper movement of the leg 1 said leg isprovided with slots 30 und 31 for aecomnlodating the sleeves 32 and 33(Fig. :said sleeves having ,round apertures 'for uit couunodutingl theround pins 34 und 35 secured to tho sloom 3G by uny suitableineensT :islor instance, by being Screwed therein us ,ghogvn in ,Fig l. :Sleeve 3Gis preferably square in cross Section nid snugly fits vtlu` opening orcutaway portion 37 in leg l, )thereby `there is no lost motion ,but efree flSlJtg' .action is Permitted The Gateway portion i317 p erintsproper backend forth nioielnent of the bar 18 inthe enlrgen'ient I23 .inleg? eo lthatthe'luegs inlay freely inox-e :together er @Part 11Sdesired and may @Set 5o Vtlat thelonter ends lnay blenzinjyv dietginee:ip'a'i 4Sleen@ 3G -loosely I.fits the `har 1S so .leely Slidetherethrough arries van adiugtiriig nieinlper 3 9 at .the out@ @Meid,etlilueting member .being .111'0' ridedriith' the LMO ,niark 4.0 which.Coasts with the eert e 41 on nut 22 seid scale heilig :di'dd in myevtebl W;iy=.1.,s im" nstliace, to shogv ThndredthS, theySfilnlt'hs andvten tliesavdths if ,fm finch, .Wtule .the :Scale .19 liorls Lema-.termeasurement. It is )to ,be uilflertil that tbeeale L9 and 4l may l)e mydesrcdlcind, as for instance, sealer; indqlting inliesehd .f ltiers v91`:Sfels nlcitili'g lmtersef im@ i911?, .theregi- 1.1.1 Ffgl ,5 Fill .beSn' a lflltly .Ilwflifd ,ferm .0 the im'sfien i Willich .the A#samePrint-irl@ .1S inverti@ @e in the `r@tened strneture 4s 1.tlyri t thedetail construction of th' 'wifed .Struetuf only will e gwen, @Saidmedi-.fied Structure Comprising Prin .ci filly "ivlmt 4 may termed cemnieniber ,4. 11nd '4,3 01,1 2 and @im nilembers t1 and .4,5 01.1 132g 1-T,..ee Cem memberg are spaced 1 eu'c'ent ,distance n art to y:pillow afree 1rilovpnient, of the ber 18 es it moves :Aztek @ed ,forth but ,willmaintain :said bur ,Silbtmtally tlm .Seme .distance frbm the. Pin 8 willInnes as the @11,538 i0f the WHS awt in tgl. certein es pivotal rQin-tso r lmjjlfe edges. Are'id'e 'from the nee o these AI nerrnlgerf; ",q,the ber 1 8 its described the struetlu'e :the'vsm'ne rnd the Lotion ofthe raviolis pdl-rs the swe- .1- l il micrmeter @f the detecter de-Ssrib'l, a Pair .nf pvoally mquntd .le S, gldjpetnble ii'li'chani'i forcontrolling 5i@ spreading of sn-'id le sI find means for Innintaininfrseid gldjustzi le lnecha'niem in a predtrgpined rnlfitionghip to thepivotal point o'f seid legis.4

` A inieronieter of the character described, )rising :i pair of llegrnernhers @totally connected together neir one end, n Spring' fortending to'separete continually' said leg me bers, a shaft extendingthrough one of said rgA `members sind Slidingly peeitioned in the otherleg member,l means aot- Von lsaid Shaft for moving Suid leg memhorstoward meh other :igfuimt the action ot' vutili Spring, mul umiller-ing; uuuulur hohl in position'hiotlw .Saune pirotirl menilwr thnttounects :will logy: togctlwr` mid imitorin'r;` uuunl'ur hufiugfproie-Miou extendingr through :lifl 1||in;;\|u| :l tuluiiur uuullifrmuro'uuding ,Su-titl shult ilv uiirlwuujti'r ut' the rhurzwter lrorilwtl rfruuu'ifiiui; :z puir of pirotullv mounted leren` vuoi! `ofsind .lege .huwingslotsvxtoiuling:Huhntguuhilly.loligitudinullyftlhervof, u pringfurmuitiiurully,urgingsaid lega to more npzu't, .-1 sliuftg, n .pin:extending through uur mul ,ogt' sind slmf t.n,nd through ,the slots ,in.our ,lL-g. u sleeve stuft-oundinfcj snidelutft und provided withpinsextonding through tlul .slots of the ,other log, figuran# foriuuintzriniug ri-,rirl shaft eontiinuadlytlusaine dituuct: from thoAniiotzrl pointof thilege, andanut threaded .onto stidshpit ,forl,moving ,Suid lege ,together `gainstuthe -actiou foi Suid spring,` Suidnin lsliding; gin lsaidfslots :is the legs `ilnoye. i

lu ,n ,inierometvr of the chzrmoter do `scribed, n pair of I iingellegs, n .egringttend ,ing to ,normally gepirartesreid ,le s, .gogh .ofSaid legs .provided ,with ,a dtgxtenling -sirlistgmtialilzvlongitudinally'4g-leve@ :i Shaft extendingY through onel of sai leggndinto the opposite ,le,q,l:1 iin iolfgrgialedm one ,end of ,Said shaftthe slot in v.oneflefsf, ,a sleeve 'surrounding aid Shaft and extendinginto the n piinextending from said .sleeve ,into thielot .iu Suid.umositc 104i, wears for miitai g said vShaft :t predetermined `disttumeVom ,the hinged point ,of ,the legs. and a nut having gr'uduatiouf;thereon threaded on togaid `Strait for noting yon mild sleeueA and seid-Shaft for .closing said loge :against the not-i013 of said spring.

In a micrfwleter @i the diameter descrihed, gl pgrir of ,hinged leg?,gisprinlg (normolli' separating ,said legs, earl; ofaidilegs haring `f1subStmti-Tllr longitiwililly :GK- tendpg slot, a troit, mennemaintaining said shaft :1 Apredeternal#ted distan@ imm the hinged pointof sind lieg, 4a joilrmled in lsaid shuft and extending into thesl'ot 0fone .nf Said legs, a altere loosely Surround ing said .Shaft :i piuextending .,frornd gleerp into rthi1 slot of 4.the Acgipzpgmisite leg,and u bnut threaded on to Said shaft :belangon Said sleoi'e for closing,sind legs ogenst the action of seid Spring.

(i. ln n micrometer of the ehurnoter .cleseribod, 1 1 pair of hingedlogs, a spring nm* Inzxlly holding Said lege epmaterl, each of .Quidlogs haring n subetmitially longitudi- .uilljf arg-nn d'slot and imopening merging into Ythe slot, :i shaft extending ltljrmigh the openingin on@ of Said legs and into the opening of the Aopposite leg, :1 pinhaving a Vinum squared end s rnd il round enter ex- `ending through SuidShaft, seid round oened on to said shaft, said nut having gradu` ationsthereon eo-acting with the zero point of said zero member, said nutacting on said sleeve and on said shaft for closing said le 7. In amicrometer of the character escribed., a pair of hinged legs, atransversely positioned ad`usting shaft, means for connecting said s aftwith one of said legs and a sliding member for connecting the other ofsaid legs to said shaft, a nut acting on said shaft for closing saidlegs, a spring acting on said legs for opening the same, and a copies o!this patent may be obtained tor ave cent: each, by addressing thecompensating device for holding said shaft the same distance from thecenter of the hinge at all times, said compensating device including anadjustable bar, a sleeve surrounding said shaft and a in extendinglthrough part of said sleeve an the shaft for pivotally connecting thesleeve with the shaft whereby inequalities and slight movements of theshaft may be accommodated.

8. In a micrometer of the character described, a pair of legs hingedtogether, a spring for opening said legs, means including a bar forclosing said legs, and means acting on the bar for maintaining the barthe same distance continually from the pivotal point of said hinge.

PETER LACKNER.

Gommlnioner of Patents,

Wishington, D. U.

